Ksport BKMZ110-435CO DualComp Rear 4-Piston Big Brake Kit with 13 in. Drilled Rotors

The Ksport BKMZ110-435CO DualComp Big Brake Kit is a complete, all-in-one dual-function rear brake upgrade engineered for serious performance driving. Designed with drifting and rally racing in mind, this kit delivers both superior foot brake and handbrake capability through a single, compact 4-piston caliper — making it one of the most versatile rear big brake systems available. This kit is Formula Drift legal and compatible with 17-inch wheels and above.

Dual-Function Caliper Design:

The DualComp system uses a single 4-pot caliper split into two independent circuits — 2 pistons dedicated to the foot brake and 2 pistons dedicated to the handbrake. Each circuit operates entirely independently on its own hydraulic system, providing precise, consistent control for both street and competition use.

Two-Piece Floating Rotor Technology:

All DualComp kits feature a two-piece floating rotor design that significantly reduces rotational mass and improves heat management. The lightweight center section is crafted from 6061-T6 aircraft-grade aluminum, which can weigh up to 50% less than OEM rotors of the same size. The floating outer ring expands and contracts independently from the aluminum hat, greatly reducing the risk of rotor warping under extreme heat. The aluminum center also acts as a heat sink, dissipating thermal energy rapidly away from the braking surface.

Key Features:

• Rear 4-piston caliper with dual independent hydraulic circuits (foot brake + handbrake)
• 330mm (13 in.) cross-drilled floating brake rotor — 32mm wide
• 6061-T6 aircraft-grade aluminum rotor center section for reduced rotational mass
• CNC machined carbon steel caliper brackets for direct bolt-on fitment at OEM caliper locations
• Polished titanium handbrake cylinder and lever included
• SC1 street brake pads included
• D.O.T.-compliant stainless steel braided brake lines standard
• Slotted or cross-drilled rotor options available
• Formula Drift legal — race-proven on drift and rally circuits
• Fits 17-inch wheels and above
• Designed for 2WD vehicles only

What's Included:

• 4-piston DualComp rear caliper(s)
• Two-piece floating cross-drilled brake disc
• SC1 street brake pads
• Polished titanium handbrake cylinder and lever
• CNC machined carbon steel caliper brackets
• DOT stainless steel braided brake lines
• All required hardware for installation

The Ksport DualComp Big Brake Kit installs with minimal tools required and no permanent vehicle modifications in most applications, making it an excellent bolt-on upgrade for performance enthusiasts seeking race-grade braking with handbrake integration.